Non-Contrast-Enhanced Silent Scan MR Angiography of Intracranial Anterior Circulation Aneurysms Treated with a Low-Profile Visualized Intraluminal Support Device

Abstract

BACKGROUND AND PURPOSE:The Low-Profile Visualized Intraluminal Support Device comprises a small-cell nitinol structure and a single-wire braided stent that provides greater metal coverage than previously reported intracranial stents, as well as assumed strong susceptibility artifacts. This study aimed to assess the benefits of non-contrast-enhanced MRA by using a Silent Scan (Silent MRA) for intracranial anterior circulation aneurysms treated with Low-Profile Visualized Intraluminal Support Device stents.

Visualization of Aneurysmal Neck and Dome after Coiling with 3D Multifusion Imaging of Silent MRA and FSE-MR Cisternography

“…I n the follow-up after the endovascular treatment of a cerebral aneurysm, the precise visualization of the shape of the neck and dome with/without remnants from coiling is necessary. [1][2][3][4][5][6][7][8][9][10][11] X-ray DSA is a reference standard to examine the above-described configuration, but it is invasive and presents certain risks related to the catheter procedure, contrast media, and radiation. 2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils.…”

“…[1][2][3][4][5][6][7][8][9][10][11] X-ray DSA is a reference standard to examine the above-described configuration, but it is invasive and presents certain risks related to the catheter procedure, contrast media, and radiation. 2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils. 2,4,5,[7][8][9][10][11] With some recent advances in MR imaging, it has been speculated that silent MRA with zero-TE and arterial spin-labeling tagging may overcome the above problems by delineating flowing blood at the neck with minimal artifacts from metal substances.…”

“…2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils. 2,4,5,[7][8][9][10][11] With some recent advances in MR imaging, it has been speculated that silent MRA with zero-TE and arterial spin-labeling tagging may overcome the above problems by delineating flowing blood at the neck with minimal artifacts from metal substances. 2,7,9,10,12 In addition, MR cisternography (MRC) with a heavily T2-weighted 3D FSE sequence can depict the shape of the aneurysmal dome together with perianeurysmal anatomic structures, including the brain parenchyma and cranial nerves.…”

Blood Flow Assessment of the Neck-bridged Stent Lumen after Stent-assisted Coiling Using 3D-TOF MRA

“…[1][2][3][4] However, despite these broader applications, SAC can result in complications such as neck remnant after coil embolization, aneurysmal recanalization, or in-stent stenosis. Therefore, regular dedicated outpatient follow-up is necessary.…”

“…6,7) Recently, silent scan MRA (Silent MRA; GE Healthcare, Milwaukee, WI, USA) was reported as a non-CE-MRA technique with capabilities such as ultra-short time of echo (UTE) and arterial spin labeling (ASL). [1][2][3][4] Its usefulness for post-SAC follow-up has been suggested; however, expensive hardware renewal is necessary. In this study, we reduced metal artifacts as much as possible by regulating parameters using current MRI devices, devised imaging methods that facilitate visual recognition for clinical follow-up of aneurysms, and obtained favorable results.…”